I reload constantly, even with a few bullets gone, I reload. Recently I've tried to wait to reload when it's more feasible, but it does get me killed, I reload religiously. I also seem to be impatient and can't stay still too long. I fire before I line up my target, relying on sometimes shooting and hoping I kill something, which gets me killed. So I usually die before I kill someone because I can't wait to make sure I have them lined up in my crosshairs. I have improved a lot since last year though, maybe next year I'll be better than some of my friends lol.
Edit: Being an idiot holding a ticking grenade while moving, sometimes missing my target but not the little freaking lamp post that knocks it back to me and kills me, or being an idiot and realizing it's a FRAG grenade and not a sticky grenade and I can't hold it past the count of five.